You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from IAH to PHX?

ASSISTANT: Yes, I am here to help you. Could you please share your trip dates?

USER: Thank you. I have planned my travel dates as Dec 30 and Jan 01.

ASSISTANT: Ok, please tell me your good name.

USER: Sure, myself Sandra Carter.

ASSISTANT: Are you fine with the connecting flight to travel?

USER: Yes, I am also looking for single connecting flight.

ASSISTANT: Ok, is there any specific timings to depart and return?

USER: Yes, I would like to depart in evening time so please check with that.

ASSISTANT: Ok, please give me a minute. Meanwhile, please share your other preferences.

USER: Sure, take your time.

ASSISTANT: I regret to inform you that, there are no flights found in this route which is departing in the evening time.

USER: Oh! It is sad to hear. Anyway, thank you for your time. I will choose  another agency this time.

ASSISTANT: You are most welcome. Thank you for approaching us.

USER: Most welcome.