You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: David Mitchell here.

ASSISTANT: Yes, please.

USER: I want to book a ticket on 01/16 and 01/18, to see Getty Center in Los Angeles. Will you help me?

ASSISTANT: Sure, can you provide me your codes of location?

USER: My airport codes are from IAH to LAX. Make sure connection must be 1.

ASSISTANT: Sorry Mitchell, no flight found.

USER: It's ok, no issues. Thank you for your information.

ASSISTANT: Thank you.