You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Matthew Roberts, want to travel from BOS to SFO.

ASSISTANT: Can you tell me your travelling dates?

USER: My travelling dates are from 04/29 to 05/01. Please check the flight with no connection.

ASSISTANT: There is no flights available.

USER: It's ok, thank you.

ASSISTANT: Welcome.