You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking my flight ticket from EWR to IAH?

ASSISTANT: May I know your desired travel dates please?

USER: My planned travel dates are May 30 to June 01.

ASSISTANT: Do you have any specifications?

USER: I prefer to fly in connected flight.

ASSISTANT: May I know your name please?

USER: Myself, Timothy Phillips. I want to travel in economy class.

ASSISTANT: Sorry to say, there is no flight on your desired  travel dates.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for opting us.