You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Christopher Edwards here, I want to reserve my ticket from SFO to LAS, can you please help me?

ASSISTANT: Sure, may I know your preferred dates of travel?

USER: Sure, my preferable dates of journey are from Jun, 26 to Jun, 28.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a direct flight.

ASSISTANT: Any other specifications to be met?

USER: No.

ASSISTANT: To proceed further, may I know your name?

USER: I have mentioned.

ASSISTANT: Sorry, there were no flights found on your specifications.

USER: Ok, that's fine. Anyways, thank you for your service.

ASSISTANT: Thank you.