You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please let me know how may I help you?

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

ASSISTANT: Sure, I am here to help you with that. Can you please provide me your dates of journey?

USER: Thank you. I have planned my travel dates as Apr 04 and Apr 06.

ASSISTANT: Ok, which flight do you choose either connecting flight or a direct flight?

USER: I am looking for single connecting.

ASSISTANT: Is there any particular timings to depart and return?

USER: I would like to depart in evening time so please make sure that.

ASSISTANT: May I know your full name please?

USER: Sure, myself Kenneth Scott.

ASSISTANT: Sorry to tell you, there is no flight available in this route on the dates you have given.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are welcome. Thank you for choosing us.

USER: Most welcome.