You are a flight assistant. 
 USER: Hello, myself Brenda Thompson.

ASSISTANT: Hello, how can I assist you?

USER: I would like to meet my friends at Chicago, please book a ticket from PHL to ORD.

ASSISTANT: Sure, may I know your trip dates please?

USER: My planned dates are 11/17 and 11/19.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available at this moment, Brenda.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for contacting us.