You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Carter.

ASSISTANT: How can I oblique you at this moment?

USER: I want to book a flight from San Francisco to Boston to attend my sister baby shower. Will you help me to book a ticket?

ASSISTANT: Ok. I will help you, may I know when your are willing to travel?

USER: I am willing to travel on 02/29 and 03/09.

ASSISTANT: Will you please mention your travelling location codes?

USER: Sorry, my return date is 03/02. Source is SFO and destination is Boston, BOS.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Its, okay. Thank you.

ASSISTANT: Thank you for approaching us.