You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I would like to travel TX - IAH from PA - PHL. Can you book me a flight ticket?

ASSISTANT: Ok, may I know your travel dates?

USER: My travelling dates are 07/29 and 07/31.

ASSISTANT: May I know your name?

USER: Myself Kimberly Carter.

ASSISTANT: Sorry no flight found.

USER: It's fine for me.Thank you for the information.

ASSISTANT: You are welcome.