You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Betty Allen.

ASSISTANT: How may I guide you?

USER: I would like to meet my friend at Chicago, will you help me in booking the flight ticket from PHL to ORD?

ASSISTANT: Sure, can I have your trip dates please?

USER: My preferable journey dates are 07/01 and 07/03.

ASSISTANT: Please hold on a moment, Allen.

USER: Ok, I will wait for your response.

ASSISTANT: Allen, no flights has been found on your travel dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing our service.