You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning to travel from PHL to SFO, can you please avail me a flight ticket?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are from Apr 6th to Apr 8th.

ASSISTANT: Ok, please mention your name.

USER: I am Stephen Rodriguez.

ASSISTANT: Ok, do you have any connection limit?

USER: I prefer a direct flight.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a nice day.