You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel from IAH to PHL. Can you help me to book a flight ticket?

ASSISTANT: May I know your travelling dates?

USER: I want to fly in the flight on Feb 07 and Feb 09.

ASSISTANT: Can I have your good name?

USER: Margaret Walker.

ASSISTANT: Is there any connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there are no flights running currently with your specified dates to travel.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.