You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Carolyn Gonzalez, can you help me in booking my flight ticket to CLT in the month of April to organise an event over there?

ASSISTANT: Sure, May I know the source code?

USER: Sure, my source code is OAK.

ASSISTANT: Please help me with your travel dates.

USER: Ok, my travel dates are in the month of April that is from Apr 18th to Apr 20th.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for opting us.