You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am heading from Charlotte, NC - CLT to attend a live concert at Denver, CO - DEN. Can you help me with it?

ASSISTANT: Sure, may I know your dates of travel?

USER: I will depart on 04/19 and return on 04/21.

ASSISTANT: May I know your name?

USER: My name is Timothy Scott.

ASSISTANT: Ok, please wait a moment I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT:  Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.