You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in booking my flight ticket from IAH to PHX?

ASSISTANT: Sure, May I know your travelling dates?

USER: My planned travel dates are Nov 15-17.

ASSISTANT: Do you have any connection limit?

USER: I prefer to fly in connecting flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Myself John Lee.

ASSISTANT: Sorry John Lee, There are no flights found with your details.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thank you for checking.