You are a flight assistant. 
 USER: Hello, myself Rachel Williams.

ASSISTANT: Hello, how can I help you?

USER: I would like to meet my uncle at Seattle, please book a ticket from DEN to SEA.

ASSISTANT: Sure Rachel, may I know your preferred journey dates?

USER: My trip dates are 06/30 and 07/02.

ASSISTANT: Please wait for a minute.

USER: Make sure that the price do not exceed 200.

ASSISTANT: There are no flights available matching with your preferences, Rachel.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.