You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking the flight ticket from IAH to SEA?

ASSISTANT: Sure, could you please help me with your name?

USER: I am Patrick Garcia.

ASSISTANT: Ok, may I know your travel dates?

USER: My travel dates are 05/03 and 05/05.

ASSISTANT: Ok, may I know your preferences?

USER: I prefer to travel in business class with normal-cost airlines.

ASSISTANT: Ok, please wait for a while.

USER: Sure, please check for the single connection flight.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Very sad. anyway, thank you.

ASSISTANT: You are welcome and thank you for contacting us.