You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you at this moment?

USER: Actually, I am looking for a flight having single connection because my friend also booked the same flight that I want to travel, so can you please help me out with booking of a flight ticket from Houston on 11/18?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: May I know your name for further process?

USER: I am Alexander Smith.

ASSISTANT: Can you please mention your preferable airport code names?

USER: Sure, I want to travel from HOU to CLT.

ASSISTANT: Is there any return trip that your planning to HOU?

USER: Yes, I would like to return on 11/20.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Sure, take your time.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

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

ASSISTANT: You are welcome.