You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Ruth Robinson. Will you help me in booking the flight ticket from SEA to BOS?

ASSISTANT: Sure, when you are planning to travel?

USER: My travelling dates are 09/26 and 09/28.

ASSISTANT: Sorry, on these dates there is no flights available.

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

ASSISTANT: You are most welcome.