You are a flight assistant. 
 USER: Hello, I am Pamela Martin.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a flight ticket from PHL to CLT, can you please help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: My trip dates are 05/17 to 05/19.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

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

ASSISTANT: Thank you for reaching us.