You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Melissa Baker, can you help me to book a flight from SFO to SEA?

ASSISTANT: Ok, may I know your trip dates to go?

USER: My trip dates are 03/09 and 03/11.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for your time, there is no flight on your route.

USER: No issues, thank you for your time.

ASSISTANT: Thanks for contacting us.