You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help you are looking from our agency?

USER: Can you please book a flight ticket from DFW to LAX?

ASSISTANT: Sure, I will help you. Can you please tell me your journey dates?

USER: Thank you. I have planned my travel dates as May 05 and May 07.

ASSISTANT: Ok, please tell me your name.

USER: Sure, myself Janet Roberts.

ASSISTANT: Is there any specifications that should met for your journey?

USER: I am looking for single connecting flight and  I do not have any more specifications.

ASSISTANT: Sorry to tell you, there are no flights 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.