You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am John Garcia.

ASSISTANT: John Garcia. How can I help you?

USER: I want to book a flight ticket from LAS to PHL, can you help me with booking please?

ASSISTANT: Provide me with the travel dates?

USER: Ok, my travelling dates are 11/15 and 11/17.

ASSISTANT: Is there any time concern?

USER: I want to return at evening.

ASSISTANT: May I know the connection limit?

USER: I need a connecting flight.

ASSISTANT: Are there any airline preferences?

USER: No.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform that there no flights on your route.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.