You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Margaret Lopez here.

ASSISTANT: Can you please tell me how can I assist you?

USER: I am planning to book a ticket from PHX to SEA to meet my parents.

ASSISTANT: May I know your travelling dates?

USER: My preferable journey dates are from 08/18 to 08/20.

ASSISTANT: As per your details there is no flight for you to book ticket.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.