You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to reserve a ticket from SFO to BOS, can you help me in doing that?

ASSISTANT: Sure, may I know your trip dates?

USER: My journey dates are Oct 14 to 16.

ASSISTANT: Ok, do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: May I know your name?

USER: Mark Wright here.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Most welcome.