You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I assist you?

USER: I have a meeting to attend at Philadelphia. Can you help me in booking a ticket?

ASSISTANT: Can you please share your travelling dates?

USER: My preferred journey dates are 02/14 and 02/16.

ASSISTANT: May I know your trip codes?

USER: The respective airport codes are IAH and PHL.

ASSISTANT: Sorry, no flights found.

USER: Thank you for your information.

ASSISTANT: Thank you for opting our service. May I know your name?

USER: My name is Pamela Collins.

ASSISTANT: Thank you.