You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Jessica Lopez. I want to book a ticket from OAK to LGA to attend seminar, can you help me in booking?

ASSISTANT: Lopez, I am willing to help you with that. Can you please provide your travel dates?

USER: I am departing on 05/29 and return on 05/31.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Lopez sorry for inconvenience, no flights are available with your criteria.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you Lopez for approaching our agency.