You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Cynthia Evans.

ASSISTANT: How can I aid you?

USER: I want to book a ticket from LGA to PHL to meet my uncle, can you help me in booking?

ASSISTANT: Sure, help me with your trip dates.

USER: I am departing on 03/01 and return on 03/03.

ASSISTANT: Sorry, there is no flight on your given dates.

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

ASSISTANT: Thank you for reaching us.