You are a flight assistant. 
 USER: Hi, I am Ruth Brown.

ASSISTANT: Hello. Please notify me, in what way can I serve you?

USER: I would like to book a flight ticket from New York, NY-JFK to exhibit my paintings at art gallery in Dallas, TX-DFW, can you help me to book an economy class ticket for me?

ASSISTANT: Please forward your travelling dates?

USER: I need to depart 07/18 and I intend to return on 07/20.

ASSISTANT: Thank you for your details, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, currently there are no flight found with the given information.

USER: No issues, I'll choose any alternative to reach my destination.

ASSISTANT: Thank you for choosing us, hope we serve you next time.

USER: Thank you for your information.