You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Please search a flight ticket from DCA to HOU?

ASSISTANT: Sure, may I know your scheduled travel dates?

USER: My travelling dates are June 23 and June 25.

ASSISTANT: Do you have any other requirements?

USER: I need my depart flight ticket at morning time.

ASSISTANT: To proceed further, may I know your name?

USER: Myself Timothy Roberts.

ASSISTANT: Ok, please wait for a minute.

USER: I prefer business class ticket. Can you please also check with that.

ASSISTANT: Ok. Sorry, there were no flights found with business class.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for contacting us.