You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Carol Jones.

ASSISTANT: How can I help you Carol Jones?

USER: I planned to attend a Marathon event, could you please help me in booking a ticket?

ASSISTANT: Sure, I am here to help you. Let me know your travelling airport codes please.

USER: My airport codes are from IAH to OAK.

ASSISTANT: Please help me on which dates you would like to travel.

USER: I would like to go on 04/27 and return on 04/29.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there is no flight available for you on your provided dates.

USER: Ok, no issue.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.