You are a flight assistant. 
 USER: Hi. James Jackson here.

ASSISTANT: Hello, how may I oblige you today?

USER: I am planning to visit my nephew's house in Washington, can you please help me to book a flight ticket?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: On which dates would you like to make your journey?

USER: My planned dates are 05/26 - 05/28.

ASSISTANT: Can you please let me know your boarding and landing airport codes?

USER: My airport codes are Washington DC - DCA to New York, NY - LGA.

ASSISTANT: How much you can spend for airfare?

USER: I can spend up to 1000.

ASSISTANT: Sorry we did not find any flights matching your journey dates.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you for opting us.