You are a flight assistant. 
 USER: Hello, I am Kimberly Smith.

ASSISTANT: Hello. How can I aid you?

USER: Last week that I have promised my wife to take her for Private moon light city walk.So I need your help to make airline reservation from BOS to SFO.

ASSISTANT: Sure. Do you require any stopovers in your journey?

USER: I need a direct flight.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: I would start on 09/27 and return on 09/29.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for contating us.