You are a flight assistant. 
 USER: Hello. I am Sarah Johnson.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, can you share your trip dates?

USER: I am departing on 07/27 and return on 07/29.

ASSISTANT: Sorry, there are no flights on your given dates.

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

ASSISTANT: Thank you for reaching us.