You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER:  I am Debra Allen want to meet my mother at AZ-PHX. Can you book  a ticket from WA-SEA?

ASSISTANT: Sure. Kindly assign your preferred dates of travelling?

USER: My travel dates are 06/21 and 06/23.

ASSISTANT: Do you need any break?

USER:  I need a halt in my journey.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER:  Ok, thank you for your help.

ASSISTANT: Thank you for choosing us.