You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to attend a Sports Live Event in DCA, can you please help me in booking a flight ticket from IAH?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: I want to fly on Oct 02 and return on Oct 04.

ASSISTANT: Do you have any specifications?

USER: I would like to prefer an economy class.

ASSISTANT: Sorry to inform you that there are no flights found on your requested criteria.

USER: Not an issue.

ASSISTANT: Can I know your name?

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: My name is Ronald Wright.

ASSISTANT: Thank you for your details.

USER: Welcome.