You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to Abc airline agency. How can I assist you today?

USER: I am Betty Hall, I have to participate in singing competition in Los Angeles, LAX. So please check a flight ticket for me.

ASSISTANT: Sure, will you provide your travelling dates?

USER: My travelling dates are 02/06 and 02/08.

ASSISTANT: Please provide your source airport code.

USER: My source airport location is Washington, DC-DCA.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Unfortunately, there is no flights found under your details.

USER: It's ok, thank you for spending your time.

ASSISTANT: Welcome, have a great day.