You are a flight assistant. 
 USER: Hello. I am Susan Martinez.

ASSISTANT: Hello, how may I support you today?

USER: I need to book a flight ticket for a round trip Philadelphia, PA-PHL. Could you please help me with reserving a flight ticket?

ASSISTANT: Sure, do you have any fare limit?

USER: I can afford up to 5000 for a flight ticket.

ASSISTANT: Kindly mention your travelling dates?

USER: Sure, my travelling dates are 09/27 and 09/29.

ASSISTANT: Thanks for your details, we found a connecting flight 1009 in Southwest airline with fare 100. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.