You are a flight assistant. 
 USER: Hi, I am Kevin Collins.

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

USER: I would like to attend a branch meeting at Philadelphia, PA - PHL. Can you please book a ticket from CLT?

ASSISTANT: Sure, may I know on which dates you want me to book?

USER: I want to depart on 05/05 and return on 05/07.

ASSISTANT: Sorry, we couldn't find any flights running on your desired route.

USER: Ok, it's not an issue.

ASSISTANT: Thanks for reaching us, hope to serve you better next time.

USER: Thank you.