You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Anderson.

ASSISTANT: How can I help you?

USER: I want to go for a vacation to Austin.Can you help me in booking a ticket?

ASSISTANT: Sure, on which date you want to travel?

USER: I would like to travel on 11/19 and 11/21.

ASSISTANT: Your nearest airport codes please?

USER: I want to travel from MSP to AUS.

ASSISTANT: Just a moment please.

USER: Sure, take your time.

ASSISTANT: I am sorry no flights found on your dates.

USER: That is not a problem.

ASSISTANT: Thank you for reaching us , have a happy journey.

USER: Anyways, thank you for your help.