You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Stephen Hernandez here. I am looking for changing my reservation due to sudden health issue, can you please help me out with that?

ASSISTANT: Sure, I will help you with that. Please wait a moment.

USER: Thank you, take your time.

ASSISTANT: I have found your reservation. Can you please mention your preferable travel dates?

USER: That's great, I am planning to leave on Aug 08 and please book my return ticket also on Aug 10.

ASSISTANT: May I know your preferable airport code names for further process?

USER: I will prefer LAX and PHX as my origin and destination airports respectively.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: I would like to return at morning time.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I am ok with connecting flight.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Oh! Sad to hear that. Anyway, I will another alternative to go there. Thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.