You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a ticket from IAH to SEA, can you help me?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My trip dates are 09/29 and 10/01.

ASSISTANT: Do you have any preferences about flight connections?

USER: I prefer a direct flight.

ASSISTANT: Do you have any preferences about class?

USER: I want to travel in economy class.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Please mention your name.

USER: I am Joshua Miller.

ASSISTANT: There are no flights found under your preferable details.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, have a great day.