You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Steve Lee here.

ASSISTANT: How can I help you at this moment?

USER: Can you please make a reservation between IAH and HOU for my conference?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: Thank you, my boarding is on Oct 25 and please book my return ticket on Oct 27.

ASSISTANT: Are you ok with connecting flight or you need a direct flight?

USER: I am ok with connecting flight.

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

USER: I would like to return at afternoon time.

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, thank you for the information.

ASSISTANT: Thank you for reaching us.

USER: Welcome.