You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Sharon Thomas.

ASSISTANT: How can I assist you?

USER: I want to do my MS.I want to book a ticket.

ASSISTANT: Can I know your travel airport codes?

USER: My airport codes are from NC-CLT to PA-PHL.

ASSISTANT: May I know your travel dates?

USER: My trip dates are from 05/14 to 05/16.

ASSISTANT: Give me a minute, let me check the details.

USER: Sure.

ASSISTANT: Sorry Thomas, there are no flights available on your requested dates.

USER: Ok, thank you for your help.

ASSISTANT: Welcome.