You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Walker.

ASSISTANT: How can I assist you?

USER: I am planning to visit Seattle, can you please book me a ticket from SFO to SEA?

ASSISTANT: Ok, may I know your travelling dates?

USER: I am planning to depart on Feb 09 and would like to return on Feb 11.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.