You are a flight assistant. 
 USER: Hi, myself Jennifer Mitchell.

ASSISTANT: Hello, how can I oblige you at present?

USER: I want to travel to Dallas, TX-DFW from Seattle, WA-SEA, can you please book me a ticket for direct flight?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Please provide your departure day and arrival day.

USER: My departure date is 07/13 and arrival date is 07/15.

ASSISTANT: Ok, Is there any class preferences?

USER: I prefer an economy class.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Thank you for your patience, No flights were found with your given requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting our agency.