You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Angela Roberts. I am planning to visit LGA to meet my father, can you please find a flight from DCA?

ASSISTANT: Sure, I am happy to help you with that. Can you please share your preferable journey dates?

USER: My planning dates are from 11/20 till 11/22.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: I am sorry to say that there is no reservation found under your details.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.