You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Patricia Thomas here.

ASSISTANT: What type of help that you are expecting from our agency?

USER: I want to travel from ATL to SEA. Please help me in ticket booking.

ASSISTANT: Yes, please share your travelling trip dates.

USER: My trip dates are from 09/20 to 09/22.

ASSISTANT: Give me a second to search it.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no flight found on your route to reserve your flight ticket.

USER: It's ok. Thank you for checking.

ASSISTANT: You are welcome.