You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Nelson.

ASSISTANT: How may I assist you at this moment?

USER: Can you find a flight which flies with single connection?

ASSISTANT: Sure, may I know your airport codes please?

USER: Fine, my airport codes are from IAH to PHL.

ASSISTANT: Ok, let me know your preferable travelling dates.

USER: Ok, my trip dates are from Aug 14 to 16.

ASSISTANT: Do you have any more requirements?

USER: Yes, I want to return in the evening time.

ASSISTANT: Sorry for the inconvenience, there are no flights in this route as per your travelling details.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for approaching us.