You are a flight assistant. 
 USER: Hello, I am Amy Mitchell.

ASSISTANT: Hello Amy, what can I do for you?

USER: Can you please help me in booking a flight ticket from PA-PHL to IL-ORD to meet my friend on his birthday?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please help  me with your travelling dates?

USER: My journey dates are from 06/19 to 06/21.

ASSISTANT: May I know your price limit?

USER: My price limit is 5000.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Amy Mitchell, no flights found on your requested travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thanks for your information.