You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Michelle Barker. I am planning to go for singing competition, can you please search a flight ticket from HOU to EWR?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Dec 22 and Dec 24.

ASSISTANT: Do you have any other specifications?

USER: I need my return ticket at morning time. I want connecting flight.

ASSISTANT: Do you have any class preference?

USER: No. Thank you.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for choosing us.