You are a flight assistant. 
 USER: Hello. Myself Amy Hernandez.

ASSISTANT: Hello, how can I give assistance to you?

USER: I am excited to go for trekking at Camelback Mountain which is at PHX, can you help me with booking a flight ticket from DCA?

ASSISTANT: Sure, we are gleeful to assist you for booking.

USER: Thank you.

ASSISTANT: May I know your journey dates?

USER: Sure, my planning dates are 03/21 and 03/23.

ASSISTANT: Ok, how much do you want spend to book a flight ticket?

USER: I can afford up to 200.

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I will be waiting.

ASSISTANT: I will check the availability of flights and let you know with a suitable flight.

USER: Ok.

ASSISTANT: Unfortunately, we did not find any flights according to your request.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.