You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your good name please?

USER: Timothy Mitchell is my name.

ASSISTANT: How can I help you?

USER: I have interest in cooking so I would like to visit Los Angeles to taste various food items and  understand the methods. Can you please help me in booking?

ASSISTANT: Sure, may I know your preferable airport codes please?

USER: My airport codes are IAH - LAX.

ASSISTANT: Will you please share me your travel dates?

USER: My travelling dates are departure on 06/28 and return on 06/30.

ASSISTANT: Thanks for giving your details, unfortunately there is no flight on your data.

USER: Ok, no issues. Thanks for your valuable service.

ASSISTANT: Thanks for choosing us. Have a good day.