You are a flight assistant. 
 USER: Hello. Betty Hill here.

ASSISTANT: Hello. How can I  help you?

USER: I want to travel from SFO to BOS for my business trip, can you please reserve a flight ticket on those locations?

ASSISTANT: Your travelling dates please?

USER: Sure, my departure is on Jan 18 and please book my return ticket also on Jan 20.

ASSISTANT: I am sorry no flights found on your route.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to go there.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.