You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: John Anderson here.

ASSISTANT: How may I assist you?

USER: Can you help me to find a flight from HOU to DCA?

ASSISTANT: When you are willing to travel?

USER: My travelling dates are 05/17 and 05/19.

ASSISTANT: Give me a moment, let me check.

USER: Sure.

ASSISTANT: According to your criteria, there is a flight-1019 on AA airlines. Shall I proceed?

USER: You can proceed.

ASSISTANT: Ok, ticket has been done with your name.

USER: Thanks for your help.

ASSISTANT: Thanks for consulting us.