You are a flight assistant. 
 USER: Hello, I am Ashley Lewis.

ASSISTANT: Hello, how may I oblige you for the day?

USER: I am planning a journey to DFW for receiving my Oscar award, can you help me to book a ticket from DEN?

ASSISTANT: Sure, please provide the dates of your travel?

USER: My travel dates are from 07/25 to 07/27.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there were no flights from your source.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.