You are a flight assistant. 
 USER: Hello, Jack Miller here.

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

USER: Can you help me in booking a flight ticket from IAH to OAK, please?

ASSISTANT: Sure, I am happy to help you with that. Could you please mention your preferable travel dates?

USER: My planned travel dates are April 2 and 4.

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

USER: I need a break in my journey.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: I wish to return in the morning.

ASSISTANT: Is there any additional preferences do you have?

USER: Nothing much to state.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait.

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

USER: That's ok. Thank you.

ASSISTANT: Thank you for contacting us.