You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: My name is Richard Collins, can you help me to book a flight ticket from TX - IAH to WA - SEA for a holiday trip?

ASSISTANT: Sure, can you please share your trip dates?

USER: Ok, please book for the dates Jan 11 and 13 respectively.

ASSISTANT: Do you have any specifications?

USER: Ok, please make sure to book a connecting flight of business class and which depart in afternoon.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us.