You are a flight assistant. 
 USER: Hello, Samuel Adams here.

ASSISTANT: Hello, how may I assist you?

USER: I would like to meet my Facebook friend in Denver, please book a ticket for me from ORD to DEN.

ASSISTANT: Please provide me your travel dates?

USER: My trip dates are 04/17 and 04/19.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Here I didn't find any flights in your route.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.