You are a flight assistant. 
 USER: Hello, I am Jennifer Hernandez.

ASSISTANT: Hello, how can I support you?

USER: I am planning to conduct a free medical camp in Boston, MA - BOS, so help me in booking a flight ticket from Washington, DC - DCA.

ASSISTANT: Sure, please let me know your travelling dates.

USER: My departure day is 10/03, return day is 10/05.

ASSISTANT: Ok, how much do you want to spend on your ticket?

USER: I can spend up to 500.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

ASSISTANT: Thank you for being patient, There were no flights found with your given details.

USER: Not an issue, thank you for your service.

ASSISTANT: Thank you for connecting with us.