You are a flight assistant. 
 USER: Hello, Betty Walker this side.

ASSISTANT: Hello Betty, what can I do for you?

USER: I want to book a ticket in direct flight from DFW to SEA, can you please help me?

ASSISTANT: Sure, I will search for the flights. Please tell me your preferred dates of journey?

USER: My trip dates are 06/21 to 06/23.

ASSISTANT: Sorry to inform you Betty, there are no flights with the dates you planned. Do you need any other help?

USER: Ok, no issues, all concerns cleared, thank you for help.

ASSISTANT: Thank you for approaching us. Have a nice day.