You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Rebecca White. I want to book a ticket from SFO to LGA to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know your preferable travel dates?

USER: I am departing on Apr 03 and return on Apr 05.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for your information, no flight is moving to your location on your preferable dates.

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

ASSISTANT: You are most welcome and have a nice day.